Re: wtf chain ring bolts

On Fri, 07 Mar 2025 16:37:43 GMT, cyclintom <cyclintom@yahoo.com>
wrote:

On Thu Mar 6 12:26:38 2025 Jeff Liebermann  wrote:

>

Aluminum crank bolts are for weight weenies, and I did try a torx
driver on them. The bolts were mismanufactured. I tossed them. Not
worth trying to return them.

 
They also may have been misordered.  There are Torx and Torx Plus
heads.  Common Torx heads have a 15 degree drive angle, while Torx
Plus has a zero degree drive angle. 
<https://i.imgur.com/dvIdABh.jpeg>
 
"The Evolution of Torx: From Torx to Torx Plus and Beyond"
<https://www.youtube.com/watch?v=EhRcWaEkHtE>  (7:52)

And of course millions of bicycles use Torx Plus fittings. Liebermann knows!

Trex perhaps?  Not millions, but it's a start.
Notice that it's a 5 lobe bit.  Probably fits a security fastener:
<https://www.trekbikes.com/us/en_US/equipment/bike-accessories/bike-tools-maintenance/bike-shop-supplies/trek-torx-plus-ipr25-security-bit/p/36771/>

More:
"Broken Bosch motor mount bolts!"  (ebike):
<https://www.mtbr.com/threads/broken-bosch-motor-mount-bolts.1174943/page-2>
<https://www.mtbr.com/attachments/1660303699180-png.1995140/>


--
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558